I go to the luggage storage near Seoul station with my friend. We have the 20-inch-carry-on luggage 2pcs and bag. Locker is enough 20-inch-carry-on suitcases 2pcs and bag. After stored baggage, we go to the N Seoul Tower on Namsan by taxi. We enjoyed a light trip.
Tip: Use the EXIT 12 Seoul station. Near EXIT 12, exist the elevator.